Implied Odds Calculator

Understanding Implied Probability

Implied probability is the conversion of betting odds into a percentage, representing the likelihood of an outcome as priced by the sportsbook.

It includes the bookmaker's margin (vig/juice), so the total implied probability across all outcomes in a market will exceed 100%.

• Negative Odds (Favorites) – Higher implied probability (e.g., -110 = 52.38%).
• Positive Odds (Underdogs) – Lower implied probability (e.g., +150 = 40%).
• Key Insight – Compare implied probability to your own estimated probability to find value bets.

How to Use the Calculator

• Enter any American odds (positive or negative).
• Click "Calculate" to see the implied probability percentage.
• Also view equivalent decimal and fractional odds formats.
• Use this to quickly assess how the sportsbook views the chance of an outcome.

For no-vig (fair) probability, check our No Vig Calculator.